63033516521 has 4 divisors (see below), whose sum is σ = 66741370452. Its totient is φ = 59325662592.

The previous prime is 63033516493. The next prime is 63033516529. The reversal of 63033516521 is 12561533036.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 17679425296 + 45354091225 = 132964^2 + 212965^2 .

It is a cyclic number.

It is not a de Polignac number, because 63033516521 - 2²⁶ = 62966407657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63033516529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1853926940 + ... + 1853926973.

It is an arithmetic number, because the mean of its divisors is an integer number (16685342613).

Almost surely, 2^63033516521 is an apocalyptic number.

It is an amenable number.

63033516521 is a deficient number, since it is larger than the sum of its proper divisors (3707853931).

63033516521 is a wasteful number, since it uses less digits than its factorization.

63033516521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3707853930.

The product of its (nonzero) digits is 48600, while the sum is 35.

The spelling of 63033516521 in words is "sixty-three billion, thirty-three million, five hundred sixteen thousand, five hundred twenty-one".